Sealing closure and method of applying same



. JAKLO SEALING CLOSURE AND METHOD OF APPLYING SAME Patented A r; 14, 1931 UNITED STATES PATENT OFFICE JOHN E. JAOOBY, O1 BROOKLYN, NEW YORK, ASBIGNOB TO LA. ION! OOBPORLTIOI,

0! NEW YORK, N. Y A CORPORATION OF NEW You CLOSURE AND METHOD 0] APPLYING an! Application filed December 3, 1927. Serial Io. 837,506.

This invention relates to a closure for scal ing an opening against pressure of considerable amount and also to a process of applying the same. The invention is particularly '6 applicable to boilers operating upon the La Mont principle as set forth in Patent No. 1,545,668, wherein a series of steam generatingtubes connected to a common header.

has of the objects of the invention is to provide a means and method whereby the tubes may be easily assembled in the header and the o ning in the header afterwards sealed against leakage of steam, said sealing true 19 being also secure against blowout or ruption by the high pressures commonly Iltl hell, the opening to be sealed red with an annular recess and lg 1g inserted into the opening and [l the recess so that it then be at a sphere of ginater radius h expansion is brought about the segment by an able tool mug being carried to Xljfill't be essary cans ripheral abut the inner "Wall of the lag time trs ated in tendency d. ra ally it per-mitts to do so nd other -heatures and advantages of will become apparent :lfrorn the e taken in a trout elevation plan side a header and a series of header closed t TlIltEIliTlUIL enlarged 'tlltfW showing the j g on and ready to be expanded or flattened by a tool.

Figure shows the condition of the plug after the tool has reached the limit of its downward motion Figure %l shows a slightly modified form of groove; the dotted line structure showing the plug prior to its being expanded or flattened; the full line structure showing it after being expanded.

Figure 5 is a slightl different form of pin from that shown inhigure 4.

igure 6 is still another form.

Referring to the drawings, 1 indicates a header of cylindrical form provided with openings for the reception of a pluralit of tubes 2. These tubes are of the general cm and size described in La Mont Patent No. 1,545,668 although not necessarilylimited to the tubes there shown. 3

- The tubes 2 are preferably expanded into the wall of the header and for convemencein expanding these tubes a bore is made diametrically through the header. That por 'tion of the opening which is to receive the tube is sli htly tapered as indie ted at a. Fig ure 1" T e portion 1), however, is cylindrical and is suitabl grooved to receives. plug or cap 3, which owns the subject matter of the present invention.

Referring now to Figure 2, the part 1 indica'tes a sectlon. of the wall of the header. The bore of this wall is not the same throughout the upper portion thereof being of somewhat greater diameter than the lower portion thereby forming a shoulder 4. A. circular recess 5 is also formed adjacent the shoulder and, preferably contiguous therewith. The

lug flma" be made in a "variety of Ways at pro erably formed from oold rolled steel; its shape is substantially that oil a air color so rent of a substantiall spherical shell. e peripheral edge may oylindri oalas shown in full lines in Figures Q5 and ti and in dotted lines in Figure 4 or such riphery may be tapered as in dotted lines Figure 5.

The car or plug is of suitable thiolroeae 'withstan the steam ressure to which the tubes it are subject and, of course, this thickness will vary with the different installotions. After the tubes 2 have been expanded into the header the plug is inserted Hi the "151 per part of the opening and against the slibulder 4 with its convex side uppermost, its diameter being such that it snugly fits the upper art of the lindrical portion of the bore. tool 6, whic may be a plunger openllil lltli ating in any suitable way by screws or at or near the end'of its flattening stroke it bears upon the portions of the plug near its peri hery.

walls of the recess when t flattened to the desired extent.

e recess 51s of such depth and sha e and so profportioned that the peripheral go or rim 0 the plug fits very tightly against the e plug has been In other words, the ve or recess is so designed that the lug a r deformation bears against the wa s of the recessand contacts with said walls throughout substantially the entire ex tent of the adjacent surfaces of walls andplug, thereby glving a steam tight seal under the pressures which are to be used.

Preferably, too, the peri heraL edge of the plug en es the inner w of the recem beore the plug has been flattened to its final stage as s an additional compression put upon the metal of the plug by contact with said inner wall, giving the plu a residual elasticity or tendency to expsn ifpermitted to do so. This is ve important when the header is raised to a high temperature as it is during the 0 eration of the generation of steam. e header walls then expand and the residual elasticity of the disc rmits it likewiseto expand, so that there is no leaks e of steam through the plug even at very big premures.

In order that the seal may be even more effective for h premures, it may be sometimes prefers le to use the construction of recess shown in Fi 4 and 5. This construction difi'ers sli tly from that of Figure Qin that the recem an upper shoulder as well as a lower shoulder and the disc is forced in between and into intimate contact with both shoulders and also with the inner wall of the races. Topermit the disc to more readily enter the recess without any danger of its lower the lower wall thereof, the disc may have initially the shape shown in Figure 2, wherein its edge is slightly flared. This is not essential, however, but may be preferable in some cases.

What is claimed as new is:

1. A procen of sealing against premre an opening in a presure retaining structure which consists in forming a concave-convex disc of resilient yet deformable material, in-

eel-ting said disc in the said opening and deformingsaiddiseinsuchamountsste magnesium-w e own in Figure 3, so that there is 7 thickness, formi suficiently to make the disc flat, whereb the resiliency of the material is maintain 2. A process of sealing against pressure an opening in a pressure vessel which consists in forming a ooncavo-convex disc of resilient but deformable material of suitable thickness, providing a shoulder in the o ening to be sealed, inserting said disc in sai opemng and against said shoulder, and deforming said disc in greater amount than that necessary to cause the edge of the disc to abut the walls of the o nin but not suflicient to make the disc at, w ereby the resiliency of the material is maintained.

3. A process of sealing an opening in a pressure retaining vessel which consists in forming a concave-convex disc of resilient' and deformable material of suitable thickness, forming a groove in the opening to be sealed, inserting said disc in said opening and deforming said disc by flattening it to a curvature flatter than that necessary to cause the walls of the groove to squeeze the edge of the disc while retainin suficient curvature to maintain the once.

.i 4. A process of sealing against prepare an openmg'in the wall of a pressure retaimng structure which consists in formin a concavo-convex metal disc of suitable ckness, forming-a groove in the opening to be sealed, inserting said disc in said 0 ning and deforming said disc to substantially a spherical radius greater than that necessary to cause the edge of the disc to abut the walls o the groove but of such radius that the resihence of the metal is retained to maintain the sealin of the opening.

Process of sealin the pressure contain in a pressure vessel which consists in fo a concave-convex metal disc in the form 0 a circular segment of a substantially spherical shell 12f suitable a groove in t e 0 ing to be sealed inserting said disc in saicf pening, and deforming said disc as substantially spherical radius greater than that necessa tocausetheedgeof'thedisctoabutthe wills of the groove but of such radius that the of the metal is by the spherical form.

6.Aprooessofaealinganopeningtobe closedagainst fluid pressure w ch consists in forming a concavo-eonvemdisc of resilient et deformable material provided with s surface arranged to be in contact with an abutmmt within the opening when the discis inserted therein said discinsa'id openinganddefdrming saiddisc to a curvature flatter than that necessary to.

causeitsedgetoabutthewallotthe but suficient to retain 'the'resilience of h material of the disc said bearing surface 00-.

operating with said abutment to control the movement pf that of the disc into pressure with said wall.

an opening against III;

,7. The combination with a portion of a pressure retaining structure having an open- 1ng therein, of a closure for said opening comprising a plug of resilient yet deformable ma terial in the form of a concavo-convex disc with its edge held firml; against the wall of the opening by the resllience of the material of the disc in the concavo-convex form.

8. The combination with a portion of a pressure retaining structure having an opening therein provided with a shoulder, of a closure for said opening comprising a plug of resilient yet deformable material in the form of a concavo-convex disc pressed against the shoulder with its edge held firmly against 1 the Wall of the opening by the resilience of the material of the disc maintained by the concave-convex form thereof; c

9. The combination with a portion of a pressure retaining structure having an opening therein provided with an undercut groove, of a closure for said openin comprising a plug of resilient yet deforma 1e material in the form of a concavo-convex disc with its edge held firmly against the wall of the groove "by the resilience of the material of the disc in its concavo-convex form.

10. A. closure for an opening in a pressure retaining structure comprising a concaveconvex disc formed of elastic but deformable material and having an annular bearing surface on the concave side of the disc and adiacent its edge of suflicient width to receive pressure for deforming the disc and causing its edge to slide on a counter surface in the openin' I.

11. closure for an opening in a pressure retaining structure comprisin a concavo-convex disc formed of elastic. ut deformable material and having a flaring edge of suflicient width to receive pressure for deforming the disc and causin its edge to slide on a counter surface in'the 0 mn Signed at New York, ew orig this 2nd day of December, 1927.

JOHN E. JACOBY. 

